This page provides access to online and downloadable calculators, for either general or specialised calculation and converting between types of objects, e.g. imperial to metric measurement, currencies, Roman numerals, … .

There are also portals to calculator collections.

The majority of these are available Free. Those not free are indicated.

There is also material on the history of calculators. This covers calculators from the Abacus to digital versions available to everyone now, as well as machines along the way. There are also calculator manuals for many older models.

These cover a limited selection of available information and software. There is much more than we can include.

Calculators

• Calcmoolator
  ‘CalcMoolator offers over 50 free financial calculators for the web, iPhone, iPad and Android devices’.
• Calculate an Earthquake Epicentre
  ‘Advanced earthquake location and magnitude exercise based on data from the 2004 earthquake off Banda Aceh on the Indonesian Island of Sumatra’.
  Now only an archived copy of the process.
• Calculators
  Financial calculators provided by Queensland Super. Covers from budgets to superannuation needs and even your expected life span.
• Calculators [AMP]
  Use menu items to access all available calculators.
• Calculators Online
  A collection of calculators online.
• Cost of Living Calculator
  Compare living costs in Australian and international cities.
• Education Cost calculators
  ‘ASG provides these calculators as a tool for parents to estimate the future costs of their children’s education. ASG’s calculators enable parents to see the itemised and total estimated costs of their education choices for one or all of their children, along with a year-by-year listing of the amounts required annually’
• Martindale’s Calculators On-Line Centre
  18 000+ calculators covering everything from automobile leasing to wind chill factors. Large collection of mathematical and scientific calculators. All easily found through a topic listing.
• Mechanical Calculators Before the 19th Century
  Find out about the development of calculating machines and some of the reasons for this.
• Standard Atmosphere Calculator
  From Digital Dutch. Use the Calculator, Table Wizard or Graphs. Provides information in response to each and allows you choices in some areas.
• What Are Your Chances ?
  A fun calculator designed to show whether you will have a successful relationship with a nominated person.
• Your Mortgage
  [What Can I Afford to Borrow ?]
  ‘The How Much Can I Borrow ? Calculator gives an indication of how much you can afford to borrow and the property value you can afford to buy. The calculator makes a number of assumptions’. Understand this is a guide only.

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History of Calculators

• Abacus
  The abacus from different parts of the world, the school abacus, images, references, further links. From Wikipedia.
• Abacus : Mystery Of The Bead
  ‘The Bead Unbaffled - An Abacus Manual’. History, techniques, care and references. You can print manuals and worksheets in PDF format.
• A Brief History of Mechanical Calculators
  ‘The purpose of this document is to briefly describe the most common non-electronic calculating devices within an historical context, and to create a source of reference to other pages in the Internet related with this topic. The journey starts 2 500 years ago with the Abacus, and ends 30 years ago with the introduction of the first electronic calculators’.
• Calculator
  An extensive historical coverage, calculating v computing, concerns on usage, references, other links and more. From Wikipedia
• Eric’s Slide Rule Site
  Introduction, history, logarithms, types and scales, manuals, how to clean, further links and more.
• Hand-held Calculator
  ‘Fascinating facts about the invention of Hand-held Calculaors’.
• Original Documents on the History of Calculators
  ‘This site contains HTML-versions of some original documents related to the early history of calculators’.
• Slide Rule
  Basic concepts, operation, design, history, advantages & disadvantages, references and further links. From Wikipedia.
• The Abacus
  Introduction, history, Interactive Abacus Tutor, calculations, techniques, articles, excerpts and analysis, The Abacus today and Resources for Teachers.
• Vintage Calculators Web Museum
  ‘A celebration of old calculators showing the evolution from mechanical calculator to pocket electronic calculator’. News, photos, timeline, FAQs, technology, links, … .
• Vintage Electronic Calculator Manuals
  ‘This is a calculator manual collection for pre-LCD electronic calculators. The calculator manuals are presented as PDFs. Many have searchable text’.
• What Can You Do With A Slide Rule ?
  University of Utah. ‘The purpose of this particular and quite idiosyncratic page is to describe common scales used on slide rules, and the kind of mathematical expressions that could be evaluated with those scales’.

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Converters

• AllMeasures
  Lets you convert almost anything from abamperes to short years. Can use partial conversions or converters for chosen measurement areas. Very extensive.
• Astronomy Conversions
  Convert between several astronomical measurements.
• Conversion Calculator
  From Infoplease. Allows conversion of length/distance, time, computer measures, area, volume, weight/mass, temperature and cooking measures. There is very little you can’t convert.
• Conversion of Units
  A German site that gives access to conversion between many units.
• Convertit
  Allows you to convert a significant range of units. Starts with larger topic areas. A development of Entisoft who also provide a shareware download or online conversion program.
• Convert-me
  ‘Interactive calculators for many measurement systems both commonly used, like metric and U.S. Avoirdupois and quite exotic like Ancient Greek and Roman’.
• Cooking Measures and Conversion Calculator
  Mainly conversions between metric/US weights and measures and British/US cooking measures.

Currency Converters

• Aquarius Soft Instant Online Currency Converter
  Works with all major currencies.
• Classic Currency Converter
  Convert one currency to another with great ease. Part of the OANDA.com site that has a range of information and tools.
• Euro Foreign Exchange Converter
  See what the Euro is worth related to about 40 currencies.
• Foreign Exchange Converter
  Change the little Aussie dollar into any other currency and see what we get !
• My Travel Guide
  What a dollar is worth in any currency plus equate any currency with another.
• Ozforex
  ‘These are interbank rates. Customers will generally get less attractive rates from foreign exchange providers and in some cases the currencies may be very difficult to exchange’.
• Real-Time Currency Converter
  Simple online process allowing you a range of conversions.
• Travel Expenses Calculator
  Check out present conversion rates for currency from any country.
• X-rates
  Get a rough idea of exchange figures for various currencies.
• Yahoo ! Australia & NZ Finance
  [Currency Conversion]
  Provides the capacity to convert most currencies from one to another.

• Digital Dutch Unit Converter
  Use the left menu to select general areas [e.g. Area, Power, Speed, …] then Input and Output menus to choose specific measurements desired. Very extensive.
• Dr’s Reference Site, The
  Change kilograms to pounds or stones and pounds, or the reverse.
• Engineering Conversion Factors
  Designed to assist conversion of engineering measurement units. Many items grouped alphabetically.
• Megaconverter
  While a commercial site, it does have many conversion modes.
• Metric Conversion Card
  Convert imperial to metric measurements. The card for Metric to Imperial can be found here.
• Metric Conversion Tables
  ‘1 000+ factors on 12 pages for Metric Conversion. Plus 30 detail pages for Btu, water, paper, density, etc’..
• Metric Typographic Units
  More a information site for metric and traditional measurements used in typography and their differences. Limited conversions.
• Online Conversions
  Convert just about anything to anything else related to it.
• Online Measurement Converters
  ‘A collection of measurement converters and calculators for all occasions. Most interactive, some just for information’.
• Online Metric Converter
  From Science made Simple. Either use the easier units [e.g. area, speed] or go to more difficult units for conversions.
• Roman Numeral and Date Conversion
  [With Roman Calculator]
  You can do all the conversions and a test to see how good you are with Roman numerals.
• Time Zone Converter
  A commercial site to allow you to ‘convert’ to the time at the destination you enter [country, city, etc.]. Also check the Time Zone Reference Card.
• World Wide Metric
  Convert any imperial measurement to a metric one at this site.
• Weights and Measures - Yahoo ! Reference
  Convert all aspects of area, length, volume, weight and mass at this site.

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Suggested Software

• Ancient Measures Converter
  ‘A nice, handy widget converting ancient measures into today’s. An important tool for rebuilding ancient constructions. Made for scientists, researchers, enthusiasts, museums and other organisations in the field of archaeology’.
• Aquarius Doft PC Currency Calculator Pro
  While shareware, the price is quite low and it is a quality product.
• Brian’s Javascript Utilities
  Download a range of calculators in the Mathematics and Science areas.
• Calculator With Paper Roll
  ‘Calculator with Paper Roll wants to help you in complex and long Math Calcs with paper roll feature that stores in memory, all of the operations you do’. Requires Net Framework 2.0+.
• Convert for Windows
  Convert a many measurements available through the topic tabs, as well as create custom conversions of your own. Select input and output fields, enter the number of input units and ‘bingo’ - there’s your answer. A small download for a great Free program !
  Now also available as a portable program.
  Highly recommended !
• Energy Costs Calculator
  ‘This Free power and water consumption calculator will allow a quick and easy calculation of the consumption of utilities of a single appliance’. You can add appliances to the list.
• Metric Conversion Table and Metric Explanations
  Explanation and history of the metric system, along with converters.
• Phoenix Converter
  Download the program. It has 19 options for conversion areas and a series of tabs for further options.
• Qmcalc Graphic Scientific Calculator
  For Windows 2000/XP and for Linux. ‘Multi-function, multi-memory, programmable scientific calculator with graphical function plotter’.
• Sieclator
  ‘A Free-to-use, fifteen-digit display, scientific calculator program which includes most of the functions incorporated in electronic calculators, plus a few additional features’. Australian developed.
• SpeedCrunch
  ‘SpeedCrunch is a fast, high precision and powerful desktop calculator. Available for Linux, Microsoft Windows, and Apple Mac OS X. You just type the expression you want to calculate and press Enter. You can see clearly what you typed along with the result in the scrollable display’.
• SwitchIt !
  Has many conversion possibilities, especially with more unusual measurements such as computer units, cooking and automotive.
• Universal Currency Converter
  Change any currency to another currency. This version runs online, but you can link to include a Free version on a web page at Free Customised Converter.
• Versaverter
  A Free downloadable program that will change anything to anything. Has 39 different tabbed indexes. Choose the left, then the right, then let it do what it does best.

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